Tribune Extras Pamphlet ScHe$. 



more marked gathering of stars in certain parts. There 

 is a bright region here, know it as tho Magellanlo 

 Clouds, and that part of the heavens la so bright that 

 \vheu it is ubove the horizon it has tho same effect as 

 the rising of the young moon, aud you will see how 

 poverty-stxicken that other region is all around it. 



The next map is one containing 324,198 stars. I thought 

 I woulO pass from stars visible to tho naked eye to those 

 brought into view by a small telescope; there were 40 

 charts, and T thought if they wero included in a single 

 chart the result couid not fail to bo of interest. If my 

 view is true, that there is an iuterspersion ol large and 

 Email star.-, the tel< scope ought to bring in stars gather- 

 ing more ricnly in tho Milky Way than elsewhere. There 

 Is an equalicv of light elsewhere, but a rich resrion in tho 

 lower part, That is Vhe zone of the Milky Way, aud by 

 thus mapping the starsln it, the MH*y Way is distinctly 

 brought into view. There are the Pleiades in the Milky 

 Way and tho head of the Ball, and here is a region 

 \vherc comparatively few stars are seen. 



Now I shall ask you to notice that a work of that kind 

 must proceed slowly. There Is a want of laborers In the 

 field. There is always a possibility that we may gather 

 In laborers here and there, and there is a possibility that 

 I may gather assistance here in this way. What ia 

 wanted is laborers to gather in. Any one can survey 

 the heavens with a telescope, aud It is only necessary to 

 carry out that survey on a uniform plan, ami then the 

 work <] aio will flc in with the work done by another 

 observer. 



If you consider this map with its 324.000 stars, you will 

 readily perceive that it takes time necessarily. Give a 

 single second to each star, and it amounts to a consider- 

 able time. The time 1 gave to that map amounted to 400 

 Lour.-, nearly. 





iLLr?ri:ATi"x OF MR. PBOCTOB'8 THEORY OF rna 



ONI VERSE. 



Take a more pnv.-orfnl leleseope, and tan number of 

 P'II-S will be i. of meiflv li creased but multiplied. 

 IVitli a ]2-iii'-h telescope you will get a greater number. 



and take one like Ilerschel'a 13 Inches In aperture 

 and 20,000,000 stars will be seen. There la a tremendous 

 work, aud the results will be worthy of tho trouble ; and 

 this la tho only ineaus we have of ascertaining tho 

 architecture of tho heavena. 



Wo have to note here that the t-tars all move. There 

 Is a wonderful process going on all around. The sun 

 takes his family along. He is called a fixed star, but in 

 reality he is moving rapidlv. The stars have a wouder- 

 fullv rapid motion. I know not which is the more won- 

 derful, tho rapid motion or tho relative immobility of 

 the still heavens. The process of chaniro in a block 

 of granite is relatively greater than those 

 processes in tho still heaven?, yet these 

 stars are everyone traveling 20 aud 30 miles hi a second, 

 ana not a star In tho heavens but has some motion. 

 Every one of them is traveling so rapidly, aud yet if 

 when a man was born the heavens wore mapped at his 

 birth, and he were to live threescore years and ten, or 

 even fourscore, at the end of that tlmo the aspect>of tho 

 heavens, to all ordinary observation, would be the aamo 

 as at the man's birth. 



THE MOTIONS OF THE FIXED STARS. 



We will now have upon the screen a few maps in 

 which I have jotted down the motions of the stars, of 

 all the stars whose mol ions have been measured, Hera 

 also you will see tho rate at which they move. These 

 little arrows show the direction m which and the rate at 

 which they are moving. I have boon obliced to 

 make the length of each of them correspond to 

 the motion of tho star In 36,000 years, that 

 is that each of them must take 36.000 yeara 

 to go to the other end of its little motion arrow. A great 

 many of them travel in tho same direction, showing 

 signs of being related tosrcther. We shall have another 

 map showing the retrion of the Twins. These two stars 

 seem to be drifting toward tho Milky Way, like waves 

 toward some mighty shore. 



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THE DRIFTING STARS OF THE GREAT BEAR. 



"" we h;ill h;.v^ a plomre hronirhr. on slu \vlnr tho 



